The edge of the sword comes from sharpening, and the fragrance of plum blossoms comes from bitter cold.

There is no fish in clear water, and there is no disciple when people look at it.

Rather than fishing in the forest, it is better to retreat and build a net.

Diligence is good at diligence, barren is good at playing; What I did was thought, but it was destroyed.

Even an immature attempt is better than a stillborn strategy.

By going up one flight of stairs, look further.